Due to the high volume of document uploads, the College Board's IDOC service is experiencing delays in it's processing. This will cause some delay in Grinnell receiving your information, but Grinnell will have access to the date you uploaded the documents to IDOC. There is no need to worry about missing a deadline due to IDOC delays.
What does this mean for you? It may be some time before you see that your documents appear as "Received" in the online Financial Aid Office on the Services tab of PioneerWeb.